Material steam drier



Nov. 24, 1925.

C. F. BLEDSOE MATERIAL swam DRIER Filed Sept. 20', 1924 3 Sheets-Sheet l Nov. 24, 1925 C. F. BLEDSOE MATERIAL STEAM DRIER Filed Sept. 20, 1924 3 Sheets-Sheet 2 E O s D E L B F 6 Nov. 24, 1925.

MATERIAL STEAM DRIER Filed Sept. 20, 1924 3 Sheets-Sheet 5 Patented Nov. 24, 1925.

UNITED CARL FREEMAN BLEDSOE, OF CHICAGO, ILLINOIS.

MATERIAL STEAM DRIER.

To all 207mm it may concern:

Be itknown that I, CARL FREEMAN Bun son a citizen of the United States, and a resident of the city of Chicago, in the county of Cool; and State of Illinois, have invented certain new and useful Improvements in a Material Steam Drier; and do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to a drying machine especially adapted for drying sand.

It is one object of this invention to pro vide a drier through which the material falls by gravity and in which the material whether wet or cloggy is thoroughly broken up into fine particles and dried and in which the drying means is embedded in the mass of material to be dried.

The invention comprises the novel structure and combinations hereinafter described and more particularly pointed out and delined in the appended claims.

In the accompanying drawings which illustrate a preferred embodiment of this invention and in which similar reference numerals refer to similar features in the different views: 1

Figure 1 is a transverse sectional view through the drying machine.

Figure 2 is an end elevational view thereof.

Figure 3 is a front elevational view thereof.

Figure 4 is a top plan view of a part of the drier taken upon the line 1-4 of Fig ure 1.

Figure 5 is an enlarged sectional upon the line 5-5 of Figure 1.

Figure 6 is an enlarged sectional upon the line 66 of Figure 1.

Figure 7 is an enlarged sectional upon the line 7-7 of Figure 1.

Figure 8 is a transverse sectional view of a slightly modified form of drier.

Referring now to the drawings which illustrate'certain embodiments of this invention, there is shown a drier consisting of two sides 1 and 2, a back 3 and a front 4: provided with suitable apertures or man holes adapted to be closed by swinging covers 6. These apertures allow proper inview view

view

spection and entry within the chamber by a tool or the like.

Serial No. 738,795.

In the present instance, the driercontenr plates the use of steam as a heating medium, which is supplied to a plurality, three in the present instance, of connected pipes i, 8 and 9, supported upon the side of the heating chamber. The pipe 7 is connected with two coils of pipes 10 and 11, which consist of horizontally arranged parallel branches, the planes of which converge toward the bottom. The steam supply pipe 8 connects with two coils of pipes 12 and 13 which are similarly arranged to the coils 10 and 11, and the planes of which converge in spaced parallel relation respectively to the coils 10 and 11. The pipe 9 is connected to two vertically arranged coils 14 and 15 which are positioned adjacent the walls of the heating chamber. The coil 14-. connects with a coil 16 therebelow which slopes clownwardly and inwardly from the end wall of the heating chamber and is suitably sustained on angle bars which are suspended by a member 17 from the coil 18; the coils 10, 11, 12 and 13 being suitably supported on the end walls of the heating chamber by brackets 18 as shown in Figure 5. The coil 16 is likewise further supported upon similar brackets 18. A screen 19 is superposed upon the coil 16 for preventing the coarse particles from passing therethrough and'below the screened coil 16 there is an inwardly sloping deflector 20 for conveying the screened sand inwardly of the chamber for a purpose that will later appear. The vertical coils 1'41 and 15 are preferably supported upon bolts 21 or the like extending from the end walls of the chamber.

The vertical coil 15 is connected by a short pipe section 22 to a coil '23 the plane of which slopes downwardly toward the front of the drier. This coil 23 is suitably supported by end brackets 18 The branches of each of the coils heretofore described lie respectively in similar planes and intermediate supports 24. may be provided as shown in Figures 5, 6 and 7 L for rigidly retaining the same.

The coil 23 extends across the heating chamber and'has a screen 25 superposed thereon for intercepting the coarse particles which will roll down the incline thereof to a channel formed by a stop flange 26. Suitable strips 27 may be placed upon the coils for supporting the screens 19 and '25 as shown in Figures 6 and 7 Below the screen 25 there is an inclined chute 28 or the like upon which the screened sand falls by gravity and slides to the front of the drier thoroughly screened and drled and ready for use. This chute is preferably supported by suitable angle bars 18 and 24 secured to the walls of the drier as shown in Figure 7.

It will be noted that the channel formed by the stop flange 26 extends beyond the forward end of the chute. Consequently, the coarse particles can be removed at will by the operator while the fine particles that have descended therewith will be sifted through the screen 25 and drop upon the pile of screened sand.

The spent steam from the coils 10 and 12 passes into a pipe 29 and that from the coils 11 and 13 passes into a pipe 30. The steam from the coil 16 passes out through a pipe 31 coupled to the pipe 29 and the spent steam from the coil 23 passes out through a pipe 32 which is coupled to the pipes 30 and 31.

In the embodiment shown in Figure 1, the

screened and dried sand or material passes only to the front of the drier. In Figure 8, I have illustrated a drier in which the dried material may pass to both the front and back of the drier. In referring to said Figure 8 it will be observed that a pair of downwardly converging coils 33 and 3a are located in the upper part of the drying chamber. These may be covered with screens 35 if desired. Below each coil there is a deflector 36 which diverts the sand or material inwardly of the heating chamber and intermediate the ends of the diverging coils 37 and 38. These diverging coils are suitably covered by a screen 39 for intercepting the coarser particles which roll down the sides thereof to channels formed by stop flanges 40 which project beyond the machine to allow the finer particles to drop on the pile of screened sand. The screened sand that descends from the screen 38 will fall upon the diverging chutes L1 and be carried to the front and back of the drier.

In the use of this drier. the heating chamber is intended to be filled with sand and as the sand is dumped in the top of the heating chamber, it will have to pass between the branches of the coils 10, 11, 12 and 13. This will cause any wet lumps to be effectively broken up before reaching the screens, and

as the heating coils extend downwardly into the center of the chamber, as well as along the sides thereof, the sand will be more thoroughly and more quickly dried, as it is being heated from within as well as from without. The screened sand from the deflector 20 will slide off onto the intermediate portion of the screen 25 giving the same an opportunity to pass through the screen 25 without being carried off with the coarse particles. The sand screened by the screen 25 will drop on the inclined chute 28 and be carried to the front of the drier ready for use.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. In a drying machine, a chamber, steamheated coils extending along the sides thereof and interiorly thereof, and an inclined heating coil near the bottom of said chamber having a screen superposed thereover.

2. In a material drier, a chamber, converging heating coils extending centrally of the chamber adapted for heating and breaking up the material.

3. In a material drier, a chamber having two sets of converging heating coils, and lateral vertical coils and a pair of oppositely disposed heated screens for the purpose set forth.

4:. In a material drier, a pair of converging heating coils, an inclined heated screen therebeneath and a chute for conveying the dried and screened material to the front of said drier.

5. In a material drier, converging coils for heating and breaking up the material, a heated screen having a channel at its front end for receiving the coarser particles of material and a chute beneath said screen, said channel projecting beyond said chute for the purpose set forth.

6. In a material drier, a chamber having converging heating coils and lateral vertical coils and oppositelydisposed heated'sc'reens for the purpose set forth.

7. In a material drier, converging heating coils, an inclined heated screen there beneath and a chute for conveying the dried. and screened material to the front of said drier.

8. In a material drier, a chamber having a plurality of sets of converging heating coils and lateral vertical coils, an inclined heated screen near the bottom of said chamber, and a second heated screen in opposed relation to the first screen.

9. In a material drier, a chamber, heating coils extending centrally of the chamber and converging downwardly, an inclined heated screen near the bottom of said chamber and having a channel at its front end for receiving the coarser particlesof material, and a chutev beneath said screen, said channel projecting beyond said chute for the purpose set forth.

10. In a material drier. converging coils for heating and breaking up the material. an inclined heated screen beneath both of said converging coils and an intermediate oppositely inclined heated screen beneath one of said converging coils and adapted to discharge unscreened material onto said first mentioned screen.

11. In a material drier, converging coils for heating and breaking up the material, a

heated inclined screen beneath said converging coils, a second oppositely inclined heated screen above said first screen and adapted to discharge coarse material thereon,

means under said second screen for deflecting fine material onto said first screen, a chute beneath said first screen and a channel on said first screen projecting beyond said chute for the purpose set forth.

In testimony whereof I have hereunto subscribed my name.

CARL FREEMAN BLEDSOE. 

